She's not the only one making millions publishing Kindle books. Bob Mayer and Jen Talty built a seven-figure indie publishing house in just two years, which they detail in their book, "How We Made Our First Million on Kindle."

YouTube star PewDiePie has reportedly made $12 million.Icon

Launch a YouTube channel

Making money on YouTube is no easy task — stars with half a million subscribers can sometimes struggle to make ends meet — but if you can crack the system, create compelling content, and build a strong following, it can lead to a lucrative career.

Five guys set out to raise $100,000 on Kickstarter for their idea for a smart watch — they ended up raising $10.2 million.Pebble

Get an idea funded on Kickstarter or Indiegogo

Kickstarter and Indiegogo are crowdfunding sites that let people submit ideas for projects or inventions. If the community likes the ideas, they can contribute money to the cause to help it come to life. You set a goal of how much money you'd like to raise from the community for your invention (example: "$1 million"). On Kickstarter, you must reach your goal to collect the community's money, while on Indiegogo, you collect the money no matter how much is raised.